Pump jack



L'ZZLUUE E. DECKER PUMP JACK 2 Sheets$heet Filed March 20, 1928 PUMPJACK Filed March 20, 1928 2 Sheets-Shes 2 E pa c/re/ l atented mlly'ltd, l2.

. nnson neonate, or DART, UHIU.

rune .racit.

Application filed. March 20, 1928. Serial No. 263,175.

The present'invention. relates to an improved pump jack of the typeemployed for converting reciprocatory motion of a power rod intovertical.reciprocatory motion of a pump rod through the medium of aninter vening rockably mounted frame with which said rods have operatingconnection.

My principal aim is to generally improve upon structures of this classby providing one which is characterized by a novel yarrangement ofdetails cooperating in a novel manner for better fulfilling requirementsof a structure of this class.-

The details and their association, and combination will be more readilyapparent from the following description and drawings.

In the drawings:

Figure 1 is a side elevation of a pump jack constructed in accordancewith the present invention.

Fig. 2 is a vertical section taken approximately upon the plane of theline 2-2 of Fig. 1, looking in the direction of the arrow.

Fig. 3 is a fragmentary perspective view of the fulcrum socket.

Fig. lis a perspective view of the linlt connector between the rockingframe, and the reciprocatory pump rod.

Referring now to the drawings by reference numerals, it will be observedthat the reference numeral 5 designates the foundation or base, thenumeral 6 the well casing, 7 the reciprocatory pump rod, 8 thehorizontal longitudinally movable power rod, 9 the adjustable support,and 10 the roekably mounted frame.

The foundation 5 is of any suitable construction, as is the well and itspump rod. The support comprises downwardly diverging supportingelements. For instance, there'is a pair of legs 11 connected at theirlower ends to the foundation, and connected at their upper ends to aconnecting bolt 12.

Then. there is a pair of front legs. Each front leg comprises an uppersection 13 with which a lower section 14- is telescopically connected.The lower sections 14 are in turn bolted, or otherwise rigidly fastenedto the well casing. The upper sections are rigidly connected to theaforesaid bolt 12.

Mounted upon the central portion of this boltis an ad ustabIe supportinglever memher 15 having a T-shaped head 16 at its bottom engaging anabutment block 17 in the vicinity of the well casing. This lever 15 isinclined and rockably rnountedupon the central portion of the bolt 12,and the upper end portion thereof is offset in a vertical manner as at18 and provided with an integral fulcrum socket 19.

The frame 10 is of general triangular form and comprises ,a, top memberin the form of an Ill-beam 20 carrying a depending arm portion 21 atone'end. The power rod 8 is pivotally connected to the lower end of thearm 21.

At the opposite end of thel'ebeam is a removable clamp 22 with which anelongated. connector link 23 is rockably connected. This link 23 has anofiiset eye 2a embracing the pump rod 7 and engaging an adjustable stopcollar 25, on the pump rod. This provides the desired flexibility ofconnection between the rocking frame and the pump rod.

. The frame also embodies a diagonal brace 26,,c0nnected at its upperend to the beam 20 and at its lower end to the arm 21. litemovably'bolted on the left hand end portion of the l-beam, we find upper andlower plates 26 and 27 respectively, the lower plate being provided withan integral depending part .28 having a rounded fulcrum head 29 restingrockably in the socket 19.

I desire to emphasize the adaptability of the structure which permitsthe frame to be disposed either up or down by reversing the position ofthe fulcrum members, whereby to permit an under-pull of the power supplymeans or an over-pull.

These and other advantages and features of the invention have doubtlessbeen made apparent by the, foregoing description and drawings.Consequently, a more lengthy description is regarded unnecessary.

Minor changes in shape, size, and rearrangement of parts coming withinthe field of invention claimed may be resorted to it desired.

Having thus described my invention, what ll claim as new is 1. In a pumpjack of the class described, a. base, a support including front and rearsupporting legs disposed in downwardly di verging relationship, afulcrum and connection bolt rigidly connected with the upper ends ofsaid legs, a supporting lever member mounted on the central portion ofsaid bolt and including a T-shaped head at its bottom adapted to bearupon said base and including a vertically otlset part at its upper endprovided with a socket, a trams including a fulcrum member rockablymounted in said socket, means for affording an operating connectionbetween the frame and a pump rod, and means for transmitting motion tosaid ,frame.

2. In a pump jack of the class described, a base, a support includingfront and rear supporting legs disposed in downwardly divergingrelationship, a pivot and connection bolt connected with the upper endsof said' legs, a lever rockably mounted on the central portion of saidbolt and including a T- shaped head at its bottom adapted to bear

